Исследование воздействия активных выпрямителей большой мощности на питающую сеть

Background: The modern electric drives of rolling mills are executed on the basis of powerful synchronous motors and the frequency converters constructed on the symmetric scheme with active rectifiers and voltage source inverters. The urgent problem is the estimation of influence of similar devices on the mains supply. Materials and methods: The results of researches are received on the basis of mathematical modeling with the usage of numerical integration and Fourier's transformation. Results: It is proved that operation of powerful active rectifiers is accompanied by considerable excess of the level of the highest voltage harmonicas, which practically do not depend on electric drive loading. Conclusions: The received results of modeling with active rectifiers allowed allocating the most significant harmonicas of voltage in the point of common coupling and estimating their level at compliance with operating standards on electric energy quality.